Seiko Cal. 3881 - 723

This Hand-Winding model from 1971 features a 37mm Two-Tone case. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-fe67652e914c]

Also known as: UFO, Crown

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1971

Related Models

• Seiko 6161-373
• Seiko 3892-544
• Seiko 5680-972
• Seiko 5279-982
• Seiko 4579-705
• Seiko 3892-895
• Seiko 3853-182
• Seiko 6158-707
• Seiko 3816-452
• Seiko 3814-499
• Seiko 4532-379
• Seiko 6122-453